public class test2 {
    public static void main(String[] args) {
        //建立数组得到可以被3整除的数字个数
        int[] arr = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
        int sum = 0;
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] % 3 == 0) {
                sum++;
            }
        }
        System.out.println(arr.length);
        System.out.println("一共有" + sum + "数字能被3整除");
    }
}
